Knowing this, we can determine the EC regime of the mixed solutions of PEO and CNCs.
Plots of the radius ratio for common viscoelastic fluids have an inflection point corresponding to the transition from the inertio-capillary (IC) regime to the EC regime [1]}, [2]}, [3]}, [4]}, [5]}.
The results for the mixed solutions of PEO and CNCs (Fig. REF ) clearly show the characteristics of the EC regime.
The plots of the radius ratio for the mixed solutions both exhibit an inflection point, and the temporal images [Fig. REF (b)] clearly show that the filament is cylindrical.
The duration of the EC regime for the mixed solutions of PEO and CNCs of different molecular weights are 46–78 ms for \(M_{w} = 1\times 10^6\)  and 750–1730 ms for \(M_{w} = 5\times 10^6\) .
